Re: I saw ISS!

From: C. Bassa via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 6 Apr 2020 14:27:01 +0200
Hi Thierry,

On Mon, Apr 6, 2020 at 1:56 PM Thierry Legault via Seesat-l
<seesat-l_at_satobs.org> wrote:
> For those of you who have catched the ISS in the
> shadow of the Earth, it could be interesting to
> know what was the situation of the Moon at that moment.

For my observation of March 23rd, 22:53UTC, it was New Moon, so the
Moon was not the cause for the illumination.

At that time the foot print of the ISS, the locations on Earth from
which ISS would be above the horizon were all past astronomical
twilight, so the Sun would be at least 18 degrees below the horizon.
This also rules out illumination of the ISS due to parts of the Earth
that are still in twilight.

Looking at some of the night time videos shot from on board the ISS,
certainly over densely populated area, lights from cities are among
the brightest sources of light to be seen, besides perhaps light from
Aurora storm. So I think that over Europe, illumination from city
lights is certainly a possibility. Practically, this would be hard to
test though...

Regards,
    Cees
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Received on Mon Apr 06 2020 - 07:27:53 UTC

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